The graph shows how the number of gallons of water in a bathtub changes as the tub is being filled.
a. What is the slope of the line?
b. How can you show that the slope of the line is constant?

How can you tell when x and y are not directly proportional?

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)

Ineed the solution to this problem and the steps.